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Appendix F

Status Propagation




This appendix covers the following topics:

This appendix provides an example topology hierarchy configuration to demonstrate how status changes are propagated from the Sun Management Center agent to the Topology agent and Sun Management Center console.


Note - The Domain Alarms at the top of the Sun Management Center console should show the count of host entities in alarm throughout the topology hierarchy. The count does not include the cumulative alarms within each host.


Example Topology Hierarchy

The following figure illustrates an example topology consisting of the following domains, groups, and entities:

In addition, there is a console viewing Domain A and there are no current alarms. Thus, the total alarm counts are zero in the console.

FIGURE  F-1 Example Topology Hierarchy

The following sections present example events or scenarios:


Event 1: Node in Module E on Host C Goes into Error (Red)

All of the above happens within a few seconds, since it is all trap based.


Event 2: Node in Module G on Host D Goes into Warning (Amber)

Assume this second event takes place after the first. This alarm is not as severe as the initial alarm currently in effect on host C.


Event 3: Node in Module F on Host C Goes into Warning (Amber)

Assume this third event takes place after the others. This is a second event on host C. This alarm is only a warning and is less severe than the previous alarm on host C, which was an error. This new alarm is in a "different" module from the previous host C alarm.


Event 4: Another Node in Module E on Host C Goes into Warning (Amber)

Assume this fourth event takes place after the others. This one is a warning in another node in module E (there is already an error on this module from one of the previous events).


Missed SNMP Traps

The delivery of SNMP traps is not guaranteed. If a status change trap is missed, then status and counts will not be updated immediately. However, this will correct itself on the next poll (generally less than five minutes).




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